I am awaiting shipment of DIY materials, I have not started yet. On a local Craigslist listing, I saw lab glassware listed. It was a guy that buys pallets of it at auction, then parts it out. I got several burettes, pipettes, bottles and graduated cylinders for USD$30. Some of it is obviously used, some is sealed in original wrappers. Is there a way to clean this stuff, that makes it safe to hold things for human ingestion? Some of the graduated cylinders are big enough I can get a brush in there; the burettes, not so much.